A method of controlling a lighting arrangement, a lighting controller and a lighting system

A lighting controller for controlling a lighting arrangement comprising a set of at least two light sources, the controller comprising:

• a timing unit for controlling the timing of operation of the light sources in a repeating non-overlapping sequence, wherein the timing unit is adapted to switch on each light source for a respective lighting duration,
• wherein the timing unit comprises a detection subunit adapted to detect the end of the lighting duration for one light source and the timing unit is adapted to use the detected end of the lighting duration as a timing trigger for switching on the next light source in the sequence;
• wherein the controller further comprises an adjustment interface, adapted to receive information about lengths of the durations, and wherein the controller is adapted to independently and individually configure each of the durations according to the received information.